zerver/lib: Remove unused imports (F401).

zerver/lib/bugdown/__init__.py

@@ -1,4 +1,3 @@
-import subprocess
 # Zulip's main markdown implementation.  See docs/markdown.md for
 # detailed documentation on our markdown syntax.
 from typing import Any, Callable, Dict, Iterable, List, Optional, Set, Text, Tuple, TypeVar, Union
@@ -11,19 +10,16 @@ import traceback
 import urllib
 import re
 import os
-import glob
 import html
 import twitter
 import platform
 import time
 import functools
-import httplib2
-import itertools
 import ujson
 import xml.etree.cElementTree as etree
 from xml.etree.cElementTree import Element, SubElement
 
-from collections import defaultdict, deque
+from collections import deque
 
 import requests
 
@@ -43,7 +39,6 @@ from zerver.lib.url_preview import preview as link_preview
 from zerver.models import (
     all_realm_filters,
     get_active_streams,
-    get_system_bot,
     Message,
     Realm,
     RealmFilter,
@@ -51,7 +46,6 @@ from zerver.models import (
     UserProfile,
     UserGroup,
 )
-import zerver.lib.alert_words as alert_words
 import zerver.lib.mention as mention
 from zerver.lib.str_utils import force_str, force_text
 from zerver.lib.tex import render_tex

zerver/lib/test_classes.py

@@ -8,18 +8,13 @@ from django.test import TestCase
 from django.test.client import (
     BOUNDARY, MULTIPART_CONTENT, encode_multipart,
 )
-from django.template import loader
 from django.test.testcases import SerializeMixin
 from django.http import HttpResponse
 from django.db.utils import IntegrityError
 
 from zerver.lib.initial_password import initial_password
-from zerver.lib.db import TimeTrackingCursor
 from zerver.lib.str_utils import force_text
 from zerver.lib.utils import is_remote_server
-from zerver.lib import cache
-from zerver.tornado.handlers import allocate_handler_id
-from zerver.worker import queue_processors
 from zerver.views.users import add_service
 
 from zerver.lib.actions import (
@@ -48,11 +43,9 @@ from zerver.models import (
     Service,
     Stream,
     Subscription,
-    UserMessage,
     UserProfile,
 )
 
-from zerver.lib.request import JsonableError
 from zilencer.models import get_remote_server_by_uuid
 
 
@@ -60,12 +53,8 @@ import base64
 import mock
 import os
 import re
-import time
 import ujson
-import unittest
 import urllib
-from six import binary_type
-from zerver.lib.str_utils import NonBinaryStr
 
 from contextlib import contextmanager
 

zerver/lib/topic_mutes.py

@@ -1,17 +1,9 @@
-from zerver.models import UserProfile
-
 from typing import Any, Callable, Dict, List, Optional, Text
 
 from zerver.models import (
-    bulk_get_recipients,
-    bulk_get_streams,
     get_stream_recipient,
     get_stream,
-    get_recipient,
-    get_stream,
     MutedTopic,
-    Recipient,
-    Stream,
     UserProfile
 )
 from sqlalchemy.sql import (
@@ -23,8 +15,6 @@ from sqlalchemy.sql import (
     Selectable
 )
 
-import ujson
-
 def get_topic_mutes(user_profile):
     # type: (UserProfile) -> List[List[Text]]
     rows = MutedTopic.objects.filter(